Read help info
You can see how much mobile data you've used when you've used the browser or sent and received email messages etc.
1. Find "Mobile Data"
Press Mobile Data.
2. View data usage
The total data usage is displayed next to Current Period.
The data usage for each application is displayed below the name of the application.
See how to turn mobile data on or off.
3. Return to the home screen
Press the Home key to return to the home screen.